[pmoehring]

Your fellow Seedcamp company www.wordy.com would help you on a written basis - check the feedback you receive and learn from it. Being here in London, reading english books and newspapers, and going to the movies will also help. Disclosure: I work at Seedcamp...

[andreasklinger]

Actually i did that approach already. (Although not with wordy but a native PR professional)

This would basically mean writing regulary articles and getting them checked with wordy. Interesting approach but i would prefer a system that shows me instantly errors i do.

[ferparra]

Good to know Peter.

Choosing a limited set of words/phrases/phrasal verbs and writing an essay based on them is also a good way of training.